chase



(No Model.) 4 Sheets-Sheet 1.

H.A.G HASE SIGNALING SYSTEM.

No. 472,983. Patented Apr. 19, 1892.

(No Model.) 4 sheetssheef 3.

H. A. CHASE.

SIGNALING SYSTEM.

No. 472,983. Patented Apr. 19,1892.

-(No Model.) 4 shgets -sheet 4.

H. A. CHASE.

SIGNALING SYSTEM. N0. 472,983. Patented Apr. 19, 1.892. [3 .11.

: mzvuyiwozw :]'est170z35' 4 E I E E E E UNITED STATES PATENT nrrcn.

HENRY A. CHASE, OF BOSTON, MASSACHUSETS, ASSIGNOR TO ALBERT WVATTS, OF SAME PLACE.

SIGNALING SYSTEM.

SPECIFICATION forming part of Letters Patent No. 472,983, dated April 19, 1892.

Application filed November 6, 1891.

To all whom, it may concern:

Be it known that I, HENRY A. CHASE, residing in Boston, county of Suffolk, and State of Massachusetts, have invented an Improvement in Signaling Systems, of which the following description,in connection with the'accompanying drawings, is a specification, like letters and figures on the drawings representing like parts.

This invention has for its object to provide a novel system for the transmission of signals from one point or station to another point or station, and is especially adapted, among other things, to be used as a police-signaling system. In accordancewith my invention a main or central office has extended from it one or more circuits,including one or more signal-transmitting boxes or apparatus, from which a signal may be sent to and recorded in the central oflice.

My invention has for one of its objects to provide a signal transmitting mechanism which is capable of transmitting a given number indicative of the transmitting mechanism in a series of short impulses and a series of long impulses, wherebytwo different and distinct purposes may be indicated by the same signal.

Anotherfeature of my present invention consists in providing a signal-transmitting apparatus of novelconstructiomas will be described, in which the signal-transmitting mechanism may be operated at different speeds or rates of movement, preferably determined by the posit-ionof a pointer located within the box and normally concealed by the door of the said box. The signal-transmitting mechanism includes a main signal or box-number and one or more auxiliary signals co-operating with the main signal to form special signals included in independent circuits governed by a switch or circuit-controller operated by the pointer, as Will be described. The main signal or box-number is transmitted at one speed and the special signals at a different speed, the speed of the main signal being termed by me as the slow or normal speed and the speed of the special signals as the fast speed.

Another feature of my invention consists in providing a signal-transmitting apparatus Serial No. 411,028. (No model.)

whereby the signal indicated by the pointer in its normal position may be transmitted a plurality of times to indicate different messages while the pointer is in its normal position.

Still another feature of my invention consists in enabling the box number or signal indicated by the normal position of the pointer consists in a novel construction of the transmitting apparatus whereby the box-number may be transmitted from the box to the central office in case of damage to the main line, as by burning out of the main line by lightning or a current of abnormal strength.

Another feature of my invention consists in controlling the closing of the box-door by the special-signal pointer, so that the pointer is required to be in its normal position before v the box-door can be closed. This feature is of special importance inabox such as herein shown and to be hereinafter described, as it insures the correct Working of the apparatus when the door is closed and avoids strain upon the transmitting mechanism, as will be described.

Another feature of my invention consists in providing the central office with a circuitcontr'olling device governed in its operation by the magnet of the register upon which the messages or signals transmitted to the central office are receivedythe said circuit-controller governing a local circuit containing a magnet, Which in turn governs theoperation of a second circuit-controller included in circuit with a signal-recording apparatus and also in circuit with an electro-magnet controlling the operation of a pole-changerlocated in the main-line'circuit, as will be described.

Another feature of my invention consists in providingthe transmitting-box with a novel construction of operatingmechanism whereby signals indicative of different messages may be transmitted from outside the box while the box-door is closed.

Other features of my invention will be pointed out in the claims at the end of this specification.

Figure 1 is a perspective view of a signaltransmitting box or apparatus embodying my invention, the box-door being shown open; Fig. 2, a detail of a portion of the box with the box-door closed and partially brokenout. Fig. 3 is a detail of the operating-pulls, to be described; Figs. 4 and 5, details of the keys employed to transmitthe signal from the outside of the box. Fig. 6 is a vertical sect-ion of the box shown in Fig. 1 on an enlarged scale, the section being taken on the line 6 6, Fig. 1, some of the parts being shown in elevation; Fig. 7, a detail of the speed-changing device to be referred to; Fig. 8, a detail in elevation of a portion of the box-dial, showing the telephone in its normal condition; Fig. 9, a detail of acentral-oflice switch orcirouitcontroller to be referred to; Fig. 10, a diagram of circuits to more clearly enable my invention to be understood; Fig. 11, a detail of a portion of the recording tape or strip, showing the manner in which the different messages are recorded thereon; and Fig. 12, a diagram of circuits to be'referred to.

My improved transmitting apparatus or box A, composed of iron or othersuitable material and provided with the usual door A, is preferably made with a pitched or inclined roof, the top A having an overhanging lip A at its front side or edge to shed or deflect rain from the top of the door A, and thereby ren-' der the box substantially water-tight.

The box A has secured within it in any suitable manner a dial or plate A which divides the box into two compartments a a. The dial A has secured to its rear side near its upper end a case or shell a within which is located my improved signal-transmitting mechanism, the said case or shell, as herein shown,'being secured by screws a to posts a on the rear face of the dial A The signal-transmitting mechanism referred to consists, essentially, of a series of break-Wheels, (shown best in Fig. 10,) the said signal-trans mitting mechanism, as represented in Fig. 10, comprising six break-wheels (marked 1) Z2 b b b and two blank wheels b The breakwheels I) b b b Z) N are mounted on a shaft b and in practice may be one complete wheel or cylinder having the breaks out or notched after the manner shown in Fig. 10.- The breakwheels Z9 Z) are mounted upon a separate shaft 19 having bearings in the case a and the shaft 12 is electrically Separated from the shaft U, as by insulation b for a purpose as will be described. The break-wheel b is provided with a cut-away portion 'or notch b and with a series of teeth on its periphery equal to the number designating the box, and the said break-wheel will be hereinafter designated by me as the box-signal wheel. The break-wheels b b b are provided with a different number of breaks or notches, which co-operate With the box-number, as will be described, to form special signals indicative of different messages or purposes, as may be desired or required by the system. The break-- wheel I) is provided with one notch, breakwheel 17 with two, and the break-wheel 19 the wheels corresponding to the half of the wheel I) on which the box-number is out, while the other half of the wheels 19 17 remains whole and corresponds to the cut-away portion or notch I9 on. the other half of the break-wheel b. The break-wheels Z) bb 850., have co-operating with them a series of contact pens or brushes 0 c c c c 0 and the break-wheels b b. have co-operating with them contact-pens c c.

The shafts b b, which practically form one shaft, are rotated,as herein shown, by aclockwork 0 consisting of a system of gears of any usual or well-known construction, provided with an escapement 0 The clockwork referred to constitutes one form of motor mechanism by which the signal-transmitting mechanism, consisting of the breakwheels mounted upon the shafts b b may be rotated, and in accordance with myinvention the rate of movement of the transmitting mechanism is govern ed by a speed-controlling device shown separately in Fig. 7, and consisting, as herein shown, of a clutch comprisinga disk 0 on the escapement-shaft 0 provided witha tooth or projection c and a toothed disk or drum 0 the teeth of which co-operate with the tooth or projection c on the disk 0 The toothed drum or disk 0 is secured to or forms part of a sleeve c", mounted on the escapement-shaft 0 to slide thereon, and the sleeve 0 is provided with a grooved hub e engaged by the forks c of alever 0 pivoted in a suitable bracket (FE-secured to or forming part of the frame-work for the IIO clock or motor mechanism, and provided at its opposite end with a pin or projection 0 which is extended into a cam-groove e on the periphery of a disk or hub 0 fast on the shaft 0 extended through the clock-case a and through the dial A, the said shaft having mounted upon it outside of the said dial a pointer 0 preferably provided witha knob or handle 0, by which the said pointer may readily be turned to any desired position. The sleeve 0 preferably has secured to or forming part of it a pendulum or weight, herein shown as a bar or rod 0 The camgroove 0 in the disk or hub e is preferably made substantially straight-for the greater portion of its length, and for a short portion or distance the said groove is made irregular or cam-shaped, as at 10. The pointer 0 norcator d, and when in this position the pin 0 on the lever c is in the highest point ornotch of the cam-groove and the toothed drum 0 is in engagement with the tooth c of the disk 0 and the sleeve having the pendulum or weight 0 is locked to the escapement-shaft 0 hen in this condition, the motor mechanism 0 if operated, will rotate the shafts b b at a determined or given speed or rate of movement, which I shall designate as th e n ormal speed. By turning the pointer c to the right or left of its normally-vertical position (shown in Fig. the'cam portion 10 of the groove 0 is removed from engagement with the pin 0 of the lever 0 and the latter is turned on its pivot, so as to move the sleeve 0 in the direction of arrow 20, Fig. 7, and thereby remove the toothed disk or drum 0 from engagement with the tooth on the disk 0 thus disconnecting the pendulum or weight c from the escapement-shaft- 0 and permitting the motor mechanism 0 to be revolved at a substantially high rate of speed,

and thereby revolve the signal-transmitting mechanism at a substantially high rate of speed.

The dial A, as shown in Fig. 1-, is provided with four disks or gradations d, marked, respectively, 1, 2', 3, and test, corresponding to' the four special-signal wheels b b b b on the shaft 12 The signal-wheels b b b b are included in independent normallyopen branch circuits, as will be described.

Referring now to Fig. 10, the signal-Wheel b and its co-operating pen 0, normally in contact with the same, are connected by a branch wire d to a circuit-terminal d herein shown as a segmental contact-strip, which in practice is mounted upon a suitable insulatingbase (Z (See Fig. 6.) The signal-wheel b and its pen 0 normally in contact with the same, are connected by the branch wire d to the circuit-terminal strip or plate d, and the break-wheel b and its cooperating pen 0 are connected by the branch wire I) .to the circuit-terminal strip (1 and the break-wheel b and its co-operat-ing pen 0 are connected by the branch wire (Z to the circuit-terminal strip (Z the said circuit-terminal strips being mounted upon the base d and electrically insulated orseparated from one another. .The base (1 preferably also has secured to it a segmental strip (Z of conducting material, forming one terminal, to which one branch (Z of the mainline circuit is connected. The wheel b and its co-operating pen 0 are connected by the branch wire (1 to the circuit-terminal cl. The circuit-terminal CD has co-operating with it a brush (Z secured to an arm d", fastened to the disk 0 and the brush (Z co-operating with one of the circuit-terminals d (Z (Z (1 d according to the position of the pointer 0 is also secured to the said arm. In the normal position of the pointer 0 (shown in Fig. 1) the brushes (Z (Z occupy the position shown in Fig. 10, the brush (1 being in contact with the circuit-terminal'strip (Z and the brush (Z being in contact with the circuit-terminal strip (Z in circuit with the wheel 19 By moving the pointer '0 either to the right or left of its normal position so as to coincide with one of the indicators cl, the arm cl is moved at the same time, so as to bring the brush 01 in contact with the terminal strip connected to the signal-wheel corresponding to the indication on the dial-- as, for instance, if the pointer 0 is moved to the left, so as to coincide with the indicatormarked 2, the arm d" will be moved so as to bring the brush (Z in contact with the circuitterminal strip d, and thereby bring the special wheel Z2 into circuit, as will be described. The pen 0 of the main-signal wheel b is connected, as herein shown, by the wire c to the line-wire (Z and the shaft b as herein represented, is connected by the brush e to the other line-wire c The line-Wires (Z c are extended from each box in the circuit to the central office 13, and are connected therein to a main battery B and to receiving-instruments', as will be described.

The main-line circuit Within the central office has included in it a pole-changer of any usual construction, comprising, as herein shown, two sets of circuit-terminals e e e e, the terminals 6 being electrically connected together bythe wire 6 which is joinedto one pole of the battery by the wire 6 and the terminals (2 e, as shown, are electrically connected together by the wire e and joined by wire e to the positive pole of the battery 13.

The two sets of circuit-terminals have cooperating with them two pole-changing contacts e 6 separated from each other by insulation c and secured to a lever e controlled in its movement by an electro-magnet e as will be described. The contact. 6 has connected to it one side of the lineas, for instance, the line-wire d and the contact e is connected to the other line-Wire e The central office preferably contains within it two receiving-instruments constructed and adjusted so as to receive the message transmitted from the box at different rates of speed. These instruments are herein shown as ordi- IIO naryrelays e 6 included in one side of the" lineas, for instance, the side el -and preferably connected in multiple with each other. As herein shown, the relay e is constructed and adjusted so as to respond to the signal transmitted at the normal speed, and the relay 6 is constructed and adjusted so as to respond to the accelerated speed of the signal. Both relays e and e are preferably arranged, as will be described, 'so as to control the operation of the same register-operating magnet 6 the said magnet, as herein shown, having one end of its coil connected to one pole of the local battery 6 the other pole of which is connected by the wires 6 e to the armatures e e of the relays 6 c and the other end of the magnet-coil being connected by wires e to the back-stops e e for the'armatures (2 6 the wires 6 6 including bell-operating magnets 6 e controlling the operation of bells e 2 The bell e is preferably made much larger than the bell 6 so that when the signal is transmitted from any box at its normal speed notice thereof will be given by the bell e in pronounced tones, Whereas when a signal is transmitted from a box at the accelerated speed the signal will be indicated by the hell 6 the sound of which is much less pronounced than the sound of the hell 6. I

I The relay 6 in the central officc is constructed and adjusted so as to respond only to the signal when transmitted at its normal speed and not at the accelerated or. quick speed, whereas. the relay e is constructed and adjusted so as to respond to the signal when transmitted at the quick speed. When the pointer c is in its normal position (shown in Fig. 1) and the transmitting mechanism of the box is in the condition shown in Fig. 10, the normal or box signal alone can be transmitted if the box should be operated,as bya person operating either of the hooks or pull-bars g 7 8 WVith the apparatus in the position just described the circuit may be traced as follows: from the positive pole of the batteryB',by wire c contact e circuit-terminal e and wire 6 to the shaft 19 from which two paths are open I to the line 61 one of which is by way of the box-signal wheel I) and its co-operating pen 0, and the other of which is through the wheel b", its pen branch wire d circuit-terminal c1 brush (Z brush c1 terminal strip 01 and wire d back to the central office through the relays e e to the pole-changing contact e terminal 6 and wire a to the negative pole of the battery.

The motor mechanism 0 is actuated to'prod uce rotation of the 'signal-transmittin g shaft 1/ and its break-wheels by means of a pullbar g, located behind the dial A and connected at its upper end to awinding crank or arm g, which operates to Wind up the motor mechanism when the pull-bar g is drawn down after the manner now commonly employed in police and fire-alarm boxes. Thepull-bar g has. secured to or forming part of it at its lower end a supplemental bar 9 preferably much wider than the bar 6, and the bar 9 is provided with a plurality of vertical slots, there being threesuch slots herein shown, and marked g g through which are extended hooks g g 9 The hooks g g g are fitted to slide in their respective slots 9 g g and are normally kept elevated by suitable springs g g Q12, secured to the said hooks at their rear sidesand to suitable stationary studs or pins fastened to the dial A or other suitable stationary part of the frame-work. The hooks g g g register with and are preferably extended through suitable'slots Q15 g in the lower portion of the dial A, the said slots .being made of different lengths, so as to obtain a different length of movement of the pull-bar g, and thereby obtain one or more repetitions of the signal. As herein shown, the slot g v is made of such length as will enable the pull-bar g to be drawn down a Sllfil cient distance to cause the signal-transmitting shaft 12 to make one complete revolution, and thereby transmit the box-signal once. The slot g is preferably made twice as long as the slot 9 and the slot 915 three times as long as the slot 9 so that when the hook g is pulled down the complete length of its slot 9 the winding-arm g is moved a sufficient distance to cause the signal transmitting shaft b to make two complete revolutions, and thereby transmit the box-signal twice, and when the hook g is drawn down to the end of its slot 9 the winding-arm g is moved a sufficient distance to cause the transmitingshaft 19 to make three complete revolutions, and thereby transmit the box-number three times. In this way the boxsignal alone transmitted at the normal speed maybe used to denote three different signals,-as, for instance, by operating the hook g and transmitting the box-signal once the operator at the central station is notified that the person at the box desires to communicate with him by telephone, and by operating the hook g and transmitting the box-signal twice in succession the officer at the central station is notified that the wagon is wanted at the box, and by operating the .hook g and causing the box-signal to be transmitted three times in succession the operator at the central station is notified that the ambulance is wanted at the box.

1 have herein indicated that a normal boxsignal received once means the telephone, twice in succession means the wagon, and three times in succession means the ambulance; but it is evident that any other desired wants or calls may be indicated in the same manner.

In order to enable to box-signal wheel I) to transmit the signal indicated by its teeth or notches to the central office for two different purposes, the wheel 6 connected to the circuit-terminal d is made blank, so that when the pointer o is turned to register with the indicator d (marked test in Fig. l) the box-number will be transmitted to the central office at the fast or accelerated speed and will operate the fast relay 6 the circuit being traced as follows, viz: from the positive pole of the battery, by wire e pole-changer, and wire o to the brush e, thence to the shaft b from which two paths are open to the current, one by way of the box-signal wheel I), pen 0, and wiree to the negative wire (1 the other. by blank wheel b wire d circuit-terminal d brushes (1 d andcontactstrip cl to wire (Z thence backto the negative pole of the battery, as has been described. As soon as the signal transmitting mechanism is operated, as by pulling the hook 9 the blank wheel I) is removed from contact with its pen 0 the long notch h being brought beneath the said penand the circuit maintained through the box-signal wheel b, the said circuit being opened by the notches co-operating pen 0.

or teeth on the said wheel. The box-signal thus transmitted serves to notify the operator at the central station that this system is in operative condition. i

It will be noticed that all the signal-wheels of the box are engaged with their co-operatin g pens or brushes'each time a signal is transmitted whether tliesaid sign al is the box-signal oraspecial signal. This feature I am enabled to accomplish, as herein shown, by controlling .the individual circuits and at the same time changing the speed of the transmittingmechanism. I

In order to protect the signal-transmitting mechanism of the box from injury by burning out the box, as by an abnormal current or by lightning, each box is provided with a safety cut-out, preferably consisting of two metallic terminals or posts g joined by a fusible connection g with one linewire, as (Z and two like posts 9 51 joined by a fusible connection 9, connected with the other line-wire,'as 6 the said fusible connections g passing through suitable slots in arcrupturing walls 9 g.

In order to increase the efficiency and reliability of the service, the pens c c, co-operating with the break-wheels b b, are connected by the branch wires 9 g to thelinewires 6 c1 beyond the fusible cut-out, and the shaft b, upon which the break-wheels b b are mounted, is connected by a pen or brush and wire 9 to a metal post 9 of the cut-out and to the ground- The breakwheels 17 b are arranged on their shaft b with relation to the break-wheel b of the signaltransmitting shaft, and the notches or teeth on the break-wheels lfb are so arranged with relation to the notches or teeth on thetransmitting-wheel b that the teeth on the wheels I) b will co-operate with their respective pens during one complete revolution of the shafts b b in the following manner, viz: The teeth on the wheel b are brought in engagement with its co-operating pen 0 when the teeth on the break-wheel I) leave its co-operating pen 0, and the teeth on the break-wheel b are brought into engagement with the co-operating pen 0 at substantially the same time as the teeth on the break-wheel b engage its The circuit for the boxsignal-transmitting wheel I) is normally complete, as described, it being a metallic circuit, whereas the circuits for the signal-wheels b I) are normally incomplete, the said wheels being included in a ground-circuit normally open at the box and also normally open at the central office or receiving-station. In case the main-line or metallic circuit is opened, as by the blowing out of'a fuse due to an abnormal current or to lightning, the receiving instruments 6 6 will become demagnet-ized and will close the local circuitof the of switches g connected by wires 9 Q83 to the battery B and co-operating with terminals g Q of a ground-tap g immediately connects both sides of the line with the ground-tap g, including a battery 9 and a relay Q63, the armature g of which cooperates with two terminals 9 g of a normallyopen circuit for the register-operating magnet 8 so that as soon as the ground-circuit at the box is closed by a tooth on the wheel b coming in contact With the pen 0 the circuit of the relay 9 is completed, thereby attracting its armature g and closing the circuit of the magnet 6 It will be noticed that the circuit of the relay 9 is closed only when a tooth on 'oneof the break-wheels b b comes in contact with one of the co-operating pens c 0, so that in the normal condition of the box the ground-tap circuit remains open at. the box even when the circuit is completed in the central office. As the wheel b is rotated the register is operated at each closure of the grounded'circuit caused by theteeth on the wheel 17 coming in contact with its pen a, and the current will be transmitted from the right of the line at, the circuit being traced as follows: from the groundh by wire 9 and brush g shaft bibreak-wheel b pen a, wire 9 61 through the relays e 6 to the pole-changingarm e thence by the contact e wires e 9 switch to the ground-tap 9, through the relay 9 and battery 9 to the ground 9 At each closureby the signal 17 the register. R will be operated and the box number or signal produced upon the tape. The armature of the register controlling magnet e governs the action of a circuit-controlling device, herein shown as a disk or wheel h, providedon one face with a pin or projection h, with which engages a fingeror detent h2 on the said armature. The disk or wheel h is provided on its periphery with a tooth or projection h adapted in the revolution of the disk to strike a circuit-terminal spring h and bring it i nto contact with aco-operating spring or circuit-terminal h of a local circuit containing a battery 77. and an e'lectro-magnet If. The circuit-coutrolling disk It is preferably revolved bya normally-wound-up motor mech anism of any usualor well-known construction. (Not herein shown.) The tooth or projection 71, is preferably located on the periphery of the disk It substantially near the stop-pin h, so that the said disk will make substantially a complete revolution before the said tooth will act on the circuit-terminals for a purpose as will be described. The electromagnet h is provided with an armature h which acts in a like manner to govern a circuit-controller comprising a disk or wheel h, provided with a detent-lug h and a toothed or notched disk or Wheel 71 detachably mounted upon the shaft or'axish of the disk or Wheel, whereby it may be readily removed from said shaft to permit of the substitution of a new notched wheel or disk, for a purpose as will be described. The detachable toothed disk 71 acts on a circuit-terminal h to bring it into engagement with its cooperating circuit-terminal 71 and thereby control two local circuits, one of which includes a local battery 7?, and a signal-receiving instrument, herein shown as a bell-magnet h and the other local circuit contains the local battery it" and pole-changing magnet 6 The local circuits referred to are provided with switches h h 71 the switch h being included in the local circuit of the battery h, the switch 71 in the local circuit of the battery It", and the switch 7L in-the local circuit of the battery 71". The receivinginstrumenth may be supposed to be located in the stable or other station. I prefer to connect all the switches 72. h 71 to a common actuating device or bar 71 (see Figs. 9 and 10,) to which is connecteda handle orlever 71 pivoted, as at 71 and having secured to it a shield or cover it, adapted to cover a manually-operated circuit-controller (shown in Fig. as a key 77/ when thesaid handle is in its normal or dotted-line position (shown in Fig. 9,) the said circuit-controller being included in a normally-open circuit provided with a local battery W and including the magnet 71 When the handle or lever 72 is in its normal or dotted-line position, the circuit of the local battery h is opened, the switch 7L20 being in its dotted-line position, Fig. 10, and the circuits of the local batteries h h" are closed, their switches h h being in their dotted-line positions. v (Shown in Fig. 10.) It will thus be seen that when the handle 71 is in its normal dotted-line position the signal-receiving instrument It will not be operated by energizing the magnet if, and the key or circuit-controller 71 is covered, so that it cannot be manipulated to close the circuit 'of the local battery. h and energize the magnet 727. In this manner the toothed wheel or disk h when set in motion will operate only the local circuit of the pole-changing magnet 6 and if it is desired to,transmit the signal indicated by the toothed disk or wheel 72, on the shaft h to the stable or other station containing the signal-receiving instrument It the handle it must be turned to uncover the key 72 and the act of uncovering the said key operates the switches 71 h 7L20, thereby opening the circuits of the local batteries h h" and closing the local circuit of the instrument h. The key 71 may now be manipulated to close the circuit of the magnet 71, and withdraw the armature 71 from engagement with the stop on the disk 71, permitting the latter to revolve, and thus close thelocal circuit of the instrument It by the'toothed disk or wheel h The toothed disk or wheel 72. is made detachable from its shaft 71 so that any desired or required signal-wheel having any desired or required number of teeth or notches may be placed upon the said shaft to transmit over the main circuit and to the stable any desired number or signal.

Another feature of my present invention located substantially near to the barrel k.

The slots k in thebits k k of the keys cooperate, respectively, With pins 70 70 (see Fig. 3) ondisks 70 70*, mounted on a post 10 (Shown in Fig. 6 as screwed into a cross-bar 7e secured to the dial A The pin 71;? is fast to the disk kiwhile the stud or pin 76 is fast to the disk is and is extended through the slot- 7c in the disk ta so that the disk k may be turned without turning the disk 7c". The disks 71: k are provided with arms 70 70 (see Fig. 3,)thesaid arms normally resting upon a stud or projection 75 of the supplemental pull-bar g and adapted to move the main pullbar 9 downward in the direction indicated by arrow 21, Fig. 3, when the disks 70 is are retated by means of their respective keys 7? 7s. The pins or projections 75 k on the disks k k are extended -th rough curved slots'or openings 70 k in the dial-plate'At The slots 7c 7c are of different lengths, so as to obtain a different range of movement'of the pulldoar, according to which disk 70 or lc is rotated by its key. I prefer to make the slot k of sufficient length to move the pull-bar downward in the direction of arrow 21 a suflicient distance to move the winding-crank g far enough to produce two complete revolutions of the transmittingshaft 11 so that when the pin 70 is acted upon by its key 76 the box-signal will be transmitted twice insuccession to the central office and denote that a wagon is wanted at the box.

madeso as to pass over-the pink on the'disk 70 while the'pin 70 on'the disk 70 will be engaged by the bit of the said key, and the slot 70 in the bitof the. key is will pass by the pin 70 and the bit k of the said key will engage the pin k. The outer door is provided with a suitable key-hole 70 through which either of the keys 7s 70 may be passed and fitted upon the post 7c The slot is in the disk 7& permits the latter disk to be turned without moving the disk 7c", so that when the wagon-key 7c is employed and turned so as to bring-the pin it to the end of its slot 7c it is not possible to transmit a wrong signal, or, in other words, the ambulancesignal cannot be operated by the wagon-key 7c, and each signal is individualized by its own key.

Another feature of my present invention consists in making a pointer 0 of novel construction, whereby the box-door A cannot be out of path of movement of the stud k when the door A'is closed, and a solid portion of the pointer will be brought into the path of movement of the stud k and the latter will strike the solid portion of the pointer-and prevent the door from being closed.

I am aware that it is old to automatically return a pointer to its normal position by the closing of the door; but'the objection to this construction is that the movement or transmitting mechanism within the box is subjected to a torsional strain and liability of derangement. By the construction herein shown and described the pointer is moved positively by hand and wrenching or derangement ot' the transmitting mechanism within the box is avoided. mitting box such as now commonly used in police-signaling, a telephone transmitter and receiver are used, and it has been found in practice that the usual flexible cord of the telephone-receiver is rapidly worn away or rendered useless after a short length of time by being caught in the door it on the outside of the dial, and it the cord is located on the inside of the dial it is liable to be caught by the pull-bar.

One of the features of my present invention has for its object to provide the dial of the box with a combined holding device and guard for the telephone-cord, which holding device and guard is herein shown as a series of hooks or bent lugs 70 arranged in the arc of a circle at the upper portion of the dial on its outer side, and over which the telephonecord lc is placed when the telephone-receiver 7c is placed in itsnormal position on its supporting yoke or lever h The box A is provided with a transmitter of any usual or wellknown construction, such as now commonly used, the mouth-piece being represented by k The box A is preferably constructed atits upper portion as shown in Fig. 6,, it having an inwardly-projecting shelf or partition k connected to the roof A and the said shelf has resting upon it one end each of detachable bars k, the other end of the said bars being supported by suitable lugs is, secured to or forming part of the rear wall of the box. The shelf in and the bars in form an upper chamber or compartment is, into which are placed the battery k and condenser 76 used in connection with the telephone. The pull- In a signal-trans-- bar g has secured to its rear side the usual contact plate or bar is, which co-operates with two terminals 10 75 of a branch or shunt circuit connected by wires 7c 10 to the line- Wires e 61 whereby the transmitting mechanism of the box is shunted out of circuit when the box is not in use, this feature being common to signal-boxes as now commonly constructed.

The door A is provided on its inner side with a locking device for the keys k 1;,whereby the said keys are prevented from being removed after being used to transmit a signal until the door A is unlocked, the act of unlocking the door withdrawing the locking device from the path of movement of the keys, so that the latter may be removed from the key-hole in the door. The locking device referred to is herein shown as a bar 70 having its end beveled, as at la, and pivoted, as at 70 to a link 70 pivoted to a lever connected to the bolt 7e the lever k, as herein shown, having a pin or stud extended into a slot 76 in the said bolt. In practice the act of unlocking the door will move the bolt 7 inthe direction of arrow 22, Fig. 2, and the said bolt, acting on pin 7e will turn the lever 7e so as to move the link R and the bar 70 attached thereto, in the direction of arrow 23, thereby withdrawing the bar 7c from the path of movement of the keys is is, the pivot-7a sliding in a slot Z0 in the link R The central oflice has located in it a 1n ultiple-circuit controller, herein shown as an indicator-dial m, provided with a series of keys or circuit-controllers, herein marked m, m m m and S, the circuit-controllers m m m m, as shown in Fig. 10, being connected each by branch wires m m to a local circuit containing a pole-changin g magnet 6 whereby the operator in the central station may manually operate a circuit-controller'm' m &c., and actuate the pole-changer to reverse the current on the line-circuit and operate the polarized bell m in the box. The circuit-com troller S may be connected in circuit with the stable or other station in any suitable or wellknown manner, as clearly shown in Fig. 12.

In order to insure the operation of the proper circuit-controller, I have provided the dial 172 with a shield m herein shown as forming part of a pointer m pivoted on the saiddial,

the said shield being provided With a notch or opening in of substantially the size of one of the circuit-controllers, so that but a single circuit-controller is accessible to the operator, the remaining circuit-controllers being covered by the shield. The dial 'm is also provided with a series of numbers or letters corresponding to the number of metallic loops or circuits extended from the central ofiice. The pivot of the pointer has secured to it below the dial m an arm on, carrying a contact-brush an, which co-operates with a circuit-terminal strip m and with circuit-terminals an, the terminals 'm being connected by wires "m to the metallic loops in which the boxes are located, as represented in Fig. 12, while the terminal strip in is connected through the telephone-instrument m and condenser m to the ground, and the telephone in each box is also connected to the metallic loop and through the condenser 70 to the ground. 3y turning the pointer to any desired,nnmberon the dial the circuit corresponding to the said number is connected to the telephone at. the central office and the circuit-controllerm, dye, corresponding to the said circuit is uncovered by the shield, while all the remaining circuitcontrollers are covered.

Referring to Fig. 11, it will be seen that the box-number is recorded on the tape by a series of short impulses marked test to indicate one purpose, and also by a series of long impulses marked telephone to indicate anotherpurpose, and, believing myself tobe the first to-provide a signaling system in which two different and distinct purposes may be indicated by the same signal without additions i thereto, subtractions therefrom, or repetitions thereof, I do not desire to limit my invention to the particular construction shown for accomplishing this feature. The tooth or projection 77, is located on the periphery of the disk substantially near the stop-pin 77/, so that the said disk h will make substantially a complete revolution before the said tooth acts on the circuit-terminal h, thereby enabling the complete signal to be received on the tape and the main line to be closed after the signal has been transmitted before the polechanger magnet e is energized to reverse the polarity of the main line. It will be noticed that the hell 6 responds to all signals transmitted from the box and the bell c to only some of said signals-as, for instance, the more important. 13y reason of the hell 8 responding to all signals, both the important and the unimportant, the reliability and positiveness of the service is greatly enhanced, for in case of failure of the loud-toned bell (2 to operate, as in case it should get out of adjustment, the signal is received upon the lowtoned bell, and as the speed at which the said signal is received is slower than the speed of the test or special signals the said signal will very readily be distinguished from the test or special signals. This feature is of great importance practically, as the chances of receiving the important signals are double what they would be if the single bell e alone is relied upon.

I claim receiving-instrument the same complete Sig-- nal without additions thereto, subtractions therefrom, or repetitions thereof at different speeds at the will of the operator, whereby two different and distinct purposes may be indicated by the same complete signal, substantially as described.

2. In a system for transmitting signals, an electric circuit, a signal-transmitting mechanism included therein and comprisinga main and auxiliary signals, a motor mechanism to operate the said transmitting mechanism, a speed-changing device to vary the speed of the motor mechanism, and thereby of the transmitting mechanism, a pointer to control the operation of the speed-changing device, and a receivingrinstrument in the electric circuit responsive to'. the varying speeds of the transmitting mechanism, substantially as de scribed.

In a systemfor transmitting signals, a metallic circuit, a signal-transmitting mechanism comprising a main-signal wheel I), normally included in said circuit, and signalwheels b I), normally disconnected from the said circuit, but adapted to be connected therein when the main-signal wheel is operated, safety-fusesincluded in the main line, contact-pens c 0, connected to the main line beyond-the safety-fuses, a receiving-instrument in the main line, and a receiving-instrument in a ground-tap normally disconnected'from the main line while the safety-fuses are in operative condition, but adapted to be connected thereto when the said fuses are rendered inoperative, substantially as described.

4:. In a system for transmitting signals, the combination of the following instrumentalities, viz: an electric circuit, a signal-box in said circuit provided with a signal-transmit ting mechanism comprising a main and auxiliary signals, a door for said box provided with a stud or projection, and a pointer in saidbox provided with a slot or opening to register with the stud or projection 011 the door when the pointer is in its normal position, thesaid pointer in its normal position permitting the door to be closed and in its abnormal position preventing the closing of he said door, subtst'antially as described.

5. In a system for transmitting signals, the combination of the following instrumentalities, viz: an electric circuit, a signal-transmitting mechanism in said circuit comprising a main'signal'in the said electric circuit and one or more auxiliary signals in normallyopen branch circuits, a circuit-controller for said branch circuits, a motor mechanism to operate the said transmitting mechanism, a speed-changing device to govern the speed of the motor mechanism, and therebyof the trans mitting mechanism, means to operate the speed-changing device, and a receiving-instrument in the main electric circuit responsive to both the main and auxiliary signals, substantially as described.

'6. In a system for transmitting signals, the combination of the following instrumentalities, viz: an electric circuit, asignal-transmitting mechanism comprising; a main-signal wheel I) and a blank wheel I), provided with a notch corresponding to the teeth on the signal-wheel b, a'normally-open branch circuit in which the blank wheel 19 is located, a circuit-controller to connect the said branch circuit to the said electric circuit, a motormechanism for ,said' transmitting mechanism, a speed-changing device for said motor mechanism, a pointer to operate the speed-changing device, and a receiving-instrument responsive to varying speeds of the motor mechanism, and thereby of the transmitting-mechanism, whereby the same signal may be transmitted with the pointer in difierent positions, substantially as described.

7. In a system for transmitting signals, a signal-box, a signal-transmitting mechanism in said boX, amotor mechanism to operate it, a'pull-bar connected to said motor mechanism and provided at its lower end with a plurality of hooks or pulls, a'dial A in said box provided with a plurality of slots or openings of difierent lengths, with which said hooks or pulls register, and a receiving-instrument in circuit with the transmitting mechanism, to operate substantially as described.

8. In a system for transmitting signals, the combination, with a signal-box provided with a normally-closed door having a key-hole or opening, of a signal-transmitting mechanism in said box consisting of a break-wheel or circuit-conducting surface provided with only the number of notches or circuit-interrupting portions necessary to indicate the number of the said box, a motor mechanism to revolve the said transmitting mechanism, a pull-bar connected to the motor mechanism, a pivoted arm k, operatively connected to the said pullbar to operate the same when the said arm is moved, a pin 10 on the arm a dial A provided with a slot, through which the pin it is extended, and a key to engage the said pin, whereby the said pull-bar may be moved a sufficient distance to effect a plurality of com plete revolutions of the signal-transmitting mechanism, substantially as described.

9. In a system for transmitting signals, a signal-box provided with a door having a keyhole or opening, a signal-transmitting mechanism in said bOX,-2L motor mechanism to operate it, a pull-bar connected to said motor mechanism, a dial A, a post 10 extended through said dial, a disk k mounted on said postand provided with a slot 10 and with a pin or stud it extended through a slot in the dial A a second disk 70*, mounted on the post 10 and provided with a pin or stud k extended through the slot in the disk 10 and through a second slot in the dial A arms on said disk to engage the pull-bar, and keys to actuate the disks and operate the pull-bar, substantially as described.

10. In a system for transmitting signals, the

combination of the following instrumentalities, viz: an electric circuit,asignal-transmitting mechanism included therein, a receiving- I instrument in said circuit, a local circuit providedwith circuit-terminals, a rotary mechanical circuit-controller governed in its operation by the said receiving-instrument and independent of the circuit-terminals of the said local circuit, an electro-magnet 71, in said local circuit, a second local circuit provided with an electro-magnet e governing the main electrical circuit and having circuit-terminals, a second rotary mechanical circuit-controller governed in its operation by the magnet h and independent of the circuit-termi- 11. In a system for transmitting signals, the combination of the following instrumentalities, viz: an electric circuit, a signal-transmitting mechanism included therein, a receivinginstrument in said circuit, a circuit-controller governed in its operation by the said receiving-instrument, a local circuit provided with circuit-terminals, an electro-magnet h in said local circuit, a circuit-controller governed in its operation by the magnet 72 a local circuit provided with an electro-magnet and having circuit-terminals operated by the said circuit controller, a second local circuit connected to the said circuit-terminals, a receiving-instrument included-in said second local circuit, a local branch circuit including the magnet 71], a manually-operated circuit-controller or key 71 and a switch 71 and a shield or cover h for the key 71 actuated by movement of the switch h, substantially as described.

12. In a system for transmitting signals, the combination of the following instrumentalities, viz: an electric circuit, a signal-transmitting mechanism in said circuit located at one point or. station, a receiving-station, a poleohanger in said circuit located in the receiving-station, an electro-magnet to operate it, a dial m within said receiving-station provided with a series of circuit-controllers or keys, and a shield on said dial normally covering the said keys and provided with a slot or opening to register with one of the said keys,

substantially as described.

13. In a system for transmitting signals, the combination of the following instrumentalities, viz: an electric circuit, a signal-transmitting mechanism included therein, a receivinginstrnment in said circuit, a circuit-controller governed in its operation by the receiving-instrument and consisting of adisk h, provided with the detent or pin it and with a tooth or projection 77. located on the periphery of the disk near the pin h, alocal circuit including an electro-magnet 71 and provided with eir cuit-terminals operated by the tooth or projection h after the receiving-instrument has received its complete signal, a circuit-controller governed in its operation by the magnet W, a local circuit provided with an electro-magnet and having circuit-terminals operated by the said circuit-controller, a second local circuit connected to the said circuit-terminals, and a receiving-instrument included in said second local circuit, substantially asv described.

14. In a system for transmitting signals, the

combination of the following instrumentalities, viz: an electric circuit, asignal-transmitting mechanism included therein and consisting of a main-signal wheel located in the said electric circuit and an auxiliary wheel located in a branch circuit, a motor mechanism to operate said signal-transmitting mechanism, a speed-changing device to control the speed of the motor mechanism,'and thereby of the transmitting mechanism, a circuit-controller to govern the branch circuit of the auxiliary mitting mechanism, a pointer to govern the operation of the speed-changing device, and a receiving instrument responsive to varying s'peedsof the transmitting mechanism, substantially as described.

16. In a system for transmitting signals, the combination of the following instrumentalities, Viz: an electric circuit, a signal-transmitting mechanism included therein, a motor mechanism to operate it, a speed-changingdevice for positively changing the speed of the motor mechanism, and thereby of the transmitting mechanism, consisting of a clutch, a cam-disk operatively connected to said clutch, and means to move said disk, and a receivinginstrument responsive to the varying speeds of the transmitting mechanism,substanti'ally as described.

17. In a signaling system, a multiple-circuit controller consisting of a dial provided with indications, keys or circuit-controllers registering with the said indications, combined with a movable shield constructed to render accessible any desired key or circuitcontroller and to render the remaining circuitcontrollers inaccessible, while the selected key or -circuitcontroller is accessible, substantially as described.

18. In a signaling system, a multiple-circuit controller consisting of a dial provided with indications, keys or circuit-controllers registering with the said indications, combined with a pointer pivoted on said dial and co-op crating with said indications and a shield to cover said keys or circuit-controllers secured to said pointer and provided with a notch or opening to register with one of said keys or circuit-controllers, whereby only the key or circuit-controller corresponding to the indication With which the pointer registers is accessible for operation, substantially as de scribed.

19. In a system for transmitting signals, the combination of the following instrumentalities, viz: an electric circuit, a signal apparatus or box included therein and provided with a signal-transmitting mechanism constructed and arranged to transmit the number indica tive of the box or apparatus .in a series of short impulses and in a series of long impulses to indicate two distinct purposes, two relays in the said electric circuit,-one of which is responsive to both the short and long in1- pulses and the other to only thelong impulses, an audible signal controlled by the relay responsive to the long impulses, and a second audible signal controlled by the relay responsive to both the long and short impulses, whereby the signals received upon the two relays may be distinguished and whereby the signals received upon the relay responsive to the long and short impulses may also be distinguished from each other, substantially as and for the purpose specified.

20. In a system for transmitting signals, the combination of the following instrumentalities, viz: an electric circuit, a signal apparatus or box included therein and provided with a signal-transmitting mechanism comprising a plurality of signal Wheels or surfaces and pens or brushes co-operating therewith, a plurality of branch circuits, in which said signalwheels and pens are connected, a circuit-controller to govern ,the condition of the said branch circuits and normally in engagement with but one of the said branch circuits, a

pointer operatively connected to the said circuit-controller, a motor mechanism to operate the signal-wheels, and a speed-changing device operated by the pointer to vary the speed of the motor mechanism, and thereby vary the rate of movement of the signal wheels or surfaces, whereby the signal may be transmitted over one branch circuit at one speed and over another branch circuit at a different speed, substantially as described.

21. In a system for transmitting signals, the combination of the following instrumentalities, viz: an electric circuit,a signal-transmitting mechanism included therein, a receivinginstrument in said circuit, a mechanically-operated circuit-controller governed in its operation by the said receiving-instrument, a local circuit provided with circuit-terminals operated by the mechanical circuit-controllena In testimony whereof I have signed my magnet h in said local circuit, a second mename to this specification in the presence of chanically-operated circuit-controller govtwo subscribing Witnesses.

erned in its operation by the magnet 727, a HENRY A. CHASE. 5 local branch circuit including the magnet 71, Witnesses:

and a key or circuit-controller 10 for said 10- J AS. H. CHURCHILL,

cal circuit, substantially as described. I SADIE C. FEARING. 

